Fixing user files

Posted on 2009-07-13
Medium Priority
Last Modified: 2012-05-07

I am trying to fix files which do not have users. I am using the following find command for it.
find / \( -nouser -o -nogroup \) | xargs ls -ld
Suppose it gives us an output of
-rwxr----- 1 12345 user_unix 943 Jan 13 12:12 /home/abcd/.profile

From the above output it is obvious that this file belongs to user "abcd" but is owned by 12345 which does not exist in /etc/passwd.

Can someone help me with a command or maybe a couple of lines of script to change the file to be owned by user "abcd" from "12345". I have many files like this that needs to be changed.

Thanks in advance.
Question by:Legatie
LVL 85

Expert Comment

ID: 24843122
Do you want all files to belong to their home? of just  /home/abcd files? or all files with an owner that does not exist in /etc/passwd
Do you want to do anything with files not under /home?

Expert Comment

ID: 24843211
You can do this using pipes in the following manner.
find / \( -nouser -o -nogroup \) | xargs chown USERNAME
Just specify the user to change it to and you're all set!
LVL 48

Expert Comment

ID: 24843566
Once you've determined which invalid UiD's belong to which user, you can do

find /home -owner 12345 | xargs chown abcd
LVL 40

Accepted Solution

omarfarid earned 1500 total points
ID: 24847361
try this script

awk -F":" '{ print $3 " " $4 " " $6 }' /etc/passwd | while read uid gid home
   find $home -nouser -o -nogroup | xargs chown $uid:$gid
LVL 40

Expert Comment

ID: 24852217
why B grade? What is missing in the solution / script?

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